Business, News Canada braces for prolonged trade war as counter-tariffs on US take effect September 8, 2026 The tariffs will apply to $20bn worth of American products, jeopardising the stability of the world’s largest bilateral trading relationship.
Bowen: Authoritarian regimes die gradually then suddenly, but Iran is not there yet The regime’s opponents will hope for more pressure to accelerate the process, writes the BBC’s international editor.
Salesforce AI Researchers Introduce UAEval4RAG: A New Benchmark to Evaluate RAG Systems’ Ability to Reject Unanswerable Queries While RAG enables responses without extensive model retraining, current evaluation frameworks focus on accuracy and relevance for answerable questions, neglecting…
Perplexity Launches Brain, a Self-Improving Memory System That Builds a Context Graph of an Agent’s Work and Learns Overnight Most AI memory remembers the user. It stores your preferences, your tastes, and your role. Perplexity is taking a different…